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Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 38659.4-2022: Electromagnetic compatibility - Risk assessment - Part 4: Risk analysis method for system Status: Valid
Basic dataStandard ID: GB/T 38659.4-2022 (GB/T38659.4-2022)Description (Translated English): Electromagnetic compatibility - Risk assessment - Part 4: Risk analysis method for system Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: L06 Word Count Estimation: 26,227 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 38659.4-2022: Electromagnetic compatibility - Risk assessment - Part 4: Risk analysis method for system---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Electromagnetic compatibility - Risk assessment - Part 4.Risk analysis method for system ICS 33.100 CCSL06 National Standards of People's Republic of China Electromagnetic Compatibility Risk Assessment Part 4.Systematic Risk Analysis Methods Released on 2022-10-12 2023-05-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee table of contentsPreface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Overview 5 5 System EMC risk analysis object 5 5.1 System Risk Assessment Unit 5 5.2 EMC Risk Analysis Item 5 6 System EMC risk analysis method 6 6.1 Analysis of cable properties 6 6.2 Cable EMC device 8 6.3 Analysis of cable shielding 9 6.4 Equipment grounding analysis 11 6.5 Analysis of crosstalk between harnesses 13 6.6 System grounding analysis 15 6.7 Analysis of Equipment Risk Value 17 6.8 Line-ground loop analysis 18 7 Verification of digital prototype and sent sample product 20 8 Submission of risk analysis results 20 Reference 21forewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document is part 4 of GB/T 38659 "Electromagnetic Compatibility Risk Assessment". GB/T 38659 has released the following parts. --- Part 1.Electrical and electronic equipment; --- Part 2.Electrical and electronic systems; --- Part 3.Equipment risk analysis method; --- Part 4.System risk analysis method. Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed and managed by the National Radio Interference Standardization Technical Committee (SAC/TC79). This document is drafted by. Shanghai Electrical Apparatus Research Institute, Shanghai Robot Industry Technology Research Institute Co., Ltd., China Recognition Shangdong (Shanghai) Inspection Testing Technology Co., Ltd., Henan Medical Device Inspection Institute, Shanghai Tianwei Certification Technology Co., Ltd., Shanghai Electric Thales Transportation Automation Department System Co., Ltd., Shanghai Zhida Technology Development Co., Ltd., Xiamen Product Quality Supervision and Inspection Institute, Nantong Shangyan Robot Technology Co., Ltd., Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd., Shanghai Electrical Equipment Testing Institute Co., Ltd., Bronte Robot Co., Ltd., Guangdong Liwang High-tech Co., Ltd., Tianjin Zhuolang Technology Development Co., Ltd. The main drafters of this document. Zheng Junqi, Yuan Shuchuan, Long Sheng, Shao Ruina, Wang Xinghai, Yu Xiaochen, Yu Chao, Chen Hao, Song Jiangwei, Ye Qiongyu, Xie Yanping, Cheng Jianghe, Hao Xu, Xing Lin, Yuan Pengfei, Zhu Yining, Zheng Kaiyu, Guo Jinlong, Sun Chunyang, Zhang Kunyu.IntroductionElectromagnetic compatibility (EMC) risk assessment technology is based on the EMC design method, using general risk assessment methods, according to the risk risk assessment procedures, classify risk levels, and establish ideal models for equipment design (equipment includes electronic and electrical systems and electronic and electrical equipment, electronic and electrical The gas system is composed of multiple electronic and electrical equipment, and the risk assessment of the electronic and electrical system is based on the completed evaluation of the electrical and electronic equipment. Based on the above), determine the risk factors, and then compare the information of the actual design of the equipment with all the risk factors in the ideal model to identify Identify the EMC risk of the equipment, and finally obtain the EMC risk level of the equipment through a specific algorithm through a relatively mature risk assessment technology. EMC risk level is used to indicate the performance of equipment in response to various EMC phenomena, and it is a new model for equipment EMC performance evaluation. GB/T 38659 aims to establish EMC risk assessment methods and analysis methods applicable to electrical and electronic equipment and systems. It is proposed to consist of four parts. --- Part 1.Electrical and electronic equipment. The purpose is to analyze the principles and implementation of the given EMC risk assessment for electrical and electronic equipment method. --- Part 2.Electrical and electronic systems. The purpose is to give analysis principles and implementation of EMC risk assessment for electrical and electronic systems method. --- Part 3.Equipment risk analysis method. The purpose is to provide specific operational methods for the risk analysis of electrical and electronic equipment. laws and procedures. --- Part 4.System risk analysis method. The purpose is to provide specific implementation methods for the risk analysis of electrical and electronic systems. laws and procedures. The mechanical structure design, interconnection cable design, application environment and other elements of the electrical and electronic system will affect the electromagnetic compatibility risk of the electrical and electronic system. Assessment provides guidance. Engineering personnel have an in-depth understanding of EMC risk assessment techniques and correctly use the EMC risk assessment specified in this document method, which will uncover the black box of EMC design of electronic and electrical systems, and can evaluate the EMC performance of the system, and can also be combined with EMC testing The results are combined with a comprehensive EMC evaluation of electrical and electronic systems. Designers or users of electrical and electronic systems, through correct EMC risk assessment, can clearly find that the existing system is The advantages, disadvantages and risks of EMC can be used to predict the pass rate of the EMC test of the system, and it can also predict the system in its life. EMC performance at each stage of the cycle. Electromagnetic Compatibility Risk Assessment Part 4.Systematic Risk Analysis Methods1 ScopeThis document gives the risk assessment values for obtaining risk elements in the electromagnetic compatibility (EMC) risk assessment of electrical and electronic systems, The procedures and methods of risk analysis are required, including the basis of risk analysis, risk analysis procedures, steps and methods of risk analysis. This document is applicable to the risk analysis in the EMC risk assessment process of electrical and electronic systems. This document combines the risk factors of the system to provide guidance for the risk analysis method of the electromagnetic compatibility of the system.2 Normative referencesThe contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 4365 Electrotechnical Terminology Electromagnetic Compatibility GB/T 7343 Measurement method for suppression characteristics of passive EMC filter devices GB/T 23694 Risk Management Terminology GB /Z 37150 EMC Reliability Risk Assessment Guidelines GB/T 31723.406 Test methods for metallic communication cables Part 4-6.EMC surface transfer impedance line injection method GB/T 31723.411 Test methods for metallic communication cables - Part 4-11.EMC jumpers, coaxial cable assemblies, connectors Coupling attenuation or shielding attenuation absorbing clamp method for toner cables GB/T 35033 30MHz~1GHz Electromagnetic shielding material conductivity and metal material lap impedance measurement method GB/T 38659.1-2020 Electromagnetic Compatibility Risk Assessment Part 1.Electrical and Electronic Equipment GB/T 38659.2-2021 Electromagnetic Compatibility Risk Assessment Part 2.Electrical and Electronic Systems IEC 62153-4-4 Test methods for metallic communication cables Part 4-4.Electromagnetic compatibility (EMC) measurement greater than or equal to 3GHz to up to above 3GHz, triaxial method] IEC 62153-4-5 Test methods for metallic communication cables Part 4-5.Electromagnetic compatibility (EMC) coupling or shielding attenuation absorption3 Terms and DefinitionsThe following terms and definitions defined in GB/T 4365, GB/T 23694, GB/T 37150 and GB/T 38659.2 apply to this document. 3.1 A system composed of multiple relatively independent but interrelated electronic and electrical equipment or electronic and electrical equipment and components. Note. According to the product classification of CISPR, the following equipment belongs to electrical and electronic systems. road vehicles, computers with separated monitors and hosts, separated indoor and outdoor units Air conditioners, industrial robots, etc. [Source. GB/T 38659.2-2021, 3.1.2] 3.2 A system composed of multiple relatively independent but interrelated electrical and electronic products. Note. The products in it are a complete electrical and electronic product. [Source. GB/T 38659.2-2021, 3.1.3] 3.3 A system composed of multiple relatively independent but interrelated electronic and electrical equipment and components. Note. Parts cannot be a separate and complete device. [Source. GB/T 38659.2-2021, 3.1.4] 3.4 When the cable is a pair of conductors, it is the radio frequency voltage between the ground-balanced middle point and the reference ground; when the cable is a bunch of conductors, it is at the specified end Under the condition of terminal impedance, the effective radio frequency disturbance voltage (asymmetrical voltage) of the entire bundle of wires relative to the reference ground is measured with a current clamp (current transformer). The vector sum of pressure). Note. Common mode disturbance (voltage or current) is transmitted between the signal line and the reference ground, which belongs to asymmetrical disturbance. [Source. GB/T 4365-2003, 161-04-09, modified] 3.5 Common mode current commonmodecurrent Specifies the vector sum of currents on two or more wires through which the Geometry cross section passes. [Source. GB/T 6113.201-2018, 3.1.12] 3.6 Common-mode interference common-modeinterference The electromagnetic interference caused by the common mode voltage of the interference voltage on the signal line and its return line (generally called the signal ground line) has the same direction. Note 1.The common mode interference voltage takes any nearby object (earth, metal chassis, reference ground plate, etc.) The wire (signal wire and its return wire) flows in the loop formed by the reference object. Note 2.Common mode interference is transmitted between the signal line and the reference ground, which belongs to asymmetric interference. [Source. GB/T 38659.1-2020, 3.5] 3.7 reference ground A conductive plane whose potential is used as a common reference voltage. Note. Also known as reference ground plane (GRP). [Source. GB/T 38659.2-2021, 3.1.8] 3.8 Sensitive signal sensitivesignal In the field of electromagnetic compatibility, it includes signals that are susceptible to electromagnetic interference and signals of components. Example. Low-level analog signal lines or components. [Source. GB/T 38659.2-2021, 3.1.9] 3.9 Noise signal noisesignal In the field of electromagnetic compatibility, it includes signals or components that are prone to electromagnetic emission disturbances. Examples. clock signal lines, pulse width modulation (PWM) signal lines, crystal oscillators, etc. [Source. GB/T 38659.2-2021, 3.1.10] 3.10 EMC ideal model EMCidealmodel Product design model that does not create any EMC risk. [Source. GB/T 38659.1-2020,3.18] 3.11 A technique of converter operation (operation) using high frequency switching with modulation to produce a specific waveform. 3.12 Cable property property of cable; PC It is a wire used to transmit electric (magnetic) energy information and realize the conversion function of electromagnetic energy. Note 1.Cables can be divided into power lines, general signal lines, sensitive signal lines, and noise signal lines according to their functions. Note 2.Sensitive signal lines and noise signal lines are collectively referred to as special signal lines. 3.13 Cable EMC device EMC device oncable; EDC Components or components installed in cables that have a suppressive effect on EMC. Examples. magnetic rings or filtering devices. 3.14 cable shielding cableshielding; CS The shielding effectiveness of the shielded cable or the bonding of the shielding layer. [Source. GB/T 38659.2-2021, 3.1.15] 3.15 The interconnection relationship between the components and the metal casing of the system. [Source. GB/T 38659.2-2021, 3.1.16] 3.16 Crosstalk caused by direct inductive or capacitive coupling between power lines and general signal lines. [Source. GB/T 38659.2-2021, 3.1.17] 3.17 Crosstalk caused by direct inductive or capacitive coupling between power lines and special signal lines. [Source. GB/T 38659.2-2021, 3.1.18] 3.18 Crosstalk caused by direct inductive or capacitive coupling between general signal lines and special signal lines. [Source. GB/T 38659.2-2021, 3.1.19] 3.19 Crosstalk caused by direct inductive or capacitive coupling between sensitive signal lines and noisy signal lines. [Source. GB/T 38659.2-2021, 3.1.20] ---Confirm all cables in the system; --- Measure the maximum distance between each cable and the chassis or reference ground; ---Confirm the risk assessment value according to Table 13.7 Checking of digital prototype and sample productSystem risk analysis can be aimed at physical prototypes or digital prototypes. In order to confirm the analyzed digital prototypes, circuit schematic files and Whether the actual physical system is consistent needs to be checked. The content of the check includes at least the following aspects. ---The main size and shape of the chassis; ---The connection relationship between each device in the system and with the chassis, earth and cables; --- EMC key equipment in the circuit schematic diagram, at least including key equipment/equipment model, filter device model, cable quantity and type etc.8 Submission of risk analysis resultsThe process and results of risk analysis for each evaluation unit shall be recorded. The relevant information being analyzed should be presented in understandable terms reached and recorded in the original record. Analysis results should be recorded in a comprehensive original record, the original record should have enough detail to ensure the correctness of the analysis. Original records should contain at least the following information. ---Objective and scope; ---The relationship between the analyzed object and the risk element assessment value; --- List the key information of the brand, specification, model and elements of the product; ---Analytical method description; --- EMC risk analysis process and results; --- Conclusion and recommendations. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 38659.4-2022_English be delivered?Answer: Upon your order, we will start to translate GB/T 38659.4-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. 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